xref: /openbmc/u-boot/include/hw_sha.h (revision 1494cc89)
1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * Header file for SHA hardware acceleration
4  *
5  * Copyright (c) 2012  Samsung Electronics
6  */
7 #ifndef __HW_SHA_H
8 #define __HW_SHA_H
9 #include <hash.h>
10 
11 /**
12  * Computes hash value of input pbuf using h/w acceleration
13  *
14  * @param in_addr	A pointer to the input buffer
15  * @param bufleni	Byte length of input buffer
16  * @param out_addr	A pointer to the output buffer. When complete
17  *			32 bytes are copied to pout[0]...pout[31]. Thus, a user
18  *			should allocate at least 32 bytes at pOut in advance.
19  * @param chunk_size	chunk size for sha256
20  */
21 void hw_sha256(const uchar * in_addr, uint buflen,
22 			uchar * out_addr, uint chunk_size);
23 
24 /**
25  * Computes hash value of input pbuf using h/w acceleration
26  *
27  * @param in_addr	A pointer to the input buffer
28  * @param bufleni	Byte length of input buffer
29  * @param out_addr	A pointer to the output buffer. When complete
30  *			32 bytes are copied to pout[0]...pout[31]. Thus, a user
31  *			should allocate at least 32 bytes at pOut in advance.
32  * @param chunk_size	chunk_size for sha1
33  */
34 void hw_sha1(const uchar * in_addr, uint buflen,
35 			uchar * out_addr, uint chunk_size);
36 
37 /*
38  * Create the context for sha progressive hashing using h/w acceleration
39  *
40  * @algo: Pointer to the hash_algo struct
41  * @ctxp: Pointer to the pointer of the context for hashing
42  * @return 0 if ok, -ve on error
43  */
44 int hw_sha_init(struct hash_algo *algo, void **ctxp);
45 
46 /*
47  * Update buffer for sha progressive hashing using h/w acceleration
48  *
49  * The context is freed by this function if an error occurs.
50  *
51  * @algo: Pointer to the hash_algo struct
52  * @ctx: Pointer to the context for hashing
53  * @buf: Pointer to the buffer being hashed
54  * @size: Size of the buffer being hashed
55  * @is_last: 1 if this is the last update; 0 otherwise
56  * @return 0 if ok, -ve on error
57  */
58 int hw_sha_update(struct hash_algo *algo, void *ctx, const void *buf,
59 		     unsigned int size, int is_last);
60 
61 /*
62  * Copy sha hash result at destination location
63  *
64  * The context is freed after completion of hash operation or after an error.
65  *
66  * @algo: Pointer to the hash_algo struct
67  * @ctx: Pointer to the context for hashing
68  * @dest_buf: Pointer to the destination buffer where hash is to be copied
69  * @size: Size of the buffer being hashed
70  * @return 0 if ok, -ve on error
71  */
72 int hw_sha_finish(struct hash_algo *algo, void *ctx, void *dest_buf,
73 		     int size);
74 
75 #endif
76